PROBLEM TO BE SOLVED: To enable accurate focus detection in an OCT apparatus without making the apparatus complicated.SOLUTION: A tomographic imaging device includes: scan means for performing two-dimensional scan on the eye fundus surface of an examined eye with light flux from a light source focus means for focusing light of the light flux from the light source on the eye fundus surface an optical path branching member which is arranged closer to the light source than the scan means and the focus means to branch the return light of the light flux from the eye fundus surface into a peripheral luminous flux and a central beam photoelectric conversion means for receiving the branched peripheral luminous flux and control means for driving the focus means according to the output of the photoelectric conversion means.COPYRIGHT: (C)2016,JPO&INPIT【課題】OCT装置において、装置を複雑化することなく精度の良いフォーカス検知を可能とする。【解決手段】光源からの光束を被検眼の眼底面で二次元走査する走査手段、光源からの光束を眼底面に集光するフォーカス手段、走査手段及びフォーカス手段よりも光源側に配置されて光束の眼底面からの戻り光を周辺光束と中央光束とに分岐する光路分岐部材、分岐した周辺光束を受光する光電変換手段、及び光電変換手段の出力に応じてフォーカス手段を駆動する制御手段、を断層像撮像装置に配する。【選択図】図1
